How to Replace Your Knock Sensor

How much to replace knock sensor please? | Yahoo Answers

ACDelco 213-3521 GM Original Equipment Ignition Knock (Detonation) Sensor

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  • How to replace the knock sensor in a 4th gen Maxima, part 1 of 2. Part 1 goes over how to use a ratchet and lots of extensions to get to the knock sensor bolt.

    Part 2 goes over how to use the wrench and prying tool (screwdriver, prybar, etc) to loosen the bolt.

    Yes, I said 'pain in the ass' what, 8 times? I must've edited out another half dozen.

    Part 2:

    I cant find a video online anywhere to see exactly how replacing the knock sensor and harness on the g35 can be done. All I know is where it's located and your post is absolutely helpful. Is there any other advice you can give on how to replace the knock sensor and harness? Anything helps, and I need to do this as soon as possible. I don't want to have to shell out damn near 400 dollars on something I'm capable of doing. It's pretty cold out here in Michigan as well and this couldn't have happened at a worse time. I'm also seeing my rpms jump when I accelerate, break, or sometimes even in idle. I read that these can be symptoms of a faulty knock sensor as well. I'm certain this is the major issue I'm dealing with. I'm also losing about 50 to 100 miles per tank on gas now. I don't want this to become a bigger issue so like I said, anything helps....

  • Disconnect the lines that run to the intake plenum, and unplug your VQ Throttle Position Sensor. You do not need to remove your throttle body for our How To Replace Your Knock Sensor Guide.

    In this video, I show you how to replace the knock sensors in a 4.8,5.3,6.0 GM vortec V8. The knock sensors on this engine can be temperamental and often are a source of headaches for owners of this engine. Often it is a result of power washing the engine and water getting trapped down where the sensors are.

    In this video I will show you step by step how to properly remove and replace the knock sensors. I also will cover some tips and info before starting the job, hopefully this will save you some time and money.

    Please note:
    once you are done, your check engine light may still be on. This is normal. After you drive around for so many miles and time, the computer will reset itself and the engine check light will turn off. Or, you need to get a scan tool and reset the codes that way.

    Sometimes, with the battery disconnected while doing the job, if disconnect long enough, that may reset the check engine light as well.
    however, if your check engine light is still on when your job is done do, not be alarmed.

    Music: Noise Attack by Kevin Macleod. Royalty free commons license.
    intro engine animation by Lee Eduard.

    03-25-2015, 10:12 AM
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  • Originally Posted by Alan Irvine
    Hi there people

    Was wondering on location and how to replace Knock sensor on A Rio 1.3L 04 Plate.

    any help would be super


    Disconnect the lines that run to the intake plenum, and unplug your VQ Throttle Position Sensor. You do not need to remove your throttle body for our How To Replace Your Knock Sensor Guide.

4.8 5.3 6.0 knock sensor replacement GM dialn911.

I stole this from somewhere a while back. Credit to whoever put it together.
If you have EJ25 maybe its similar - (?)

Some quick notes and pictures on how to replace the knock sensor on a 1995 Subaru Legacy Outback (2.2 liter EJ22 engine). Click images to enlarge.

The engine - not very clean!

New knock sensor.

Move the throttle body intake pipe out of the way.

Sensor location is on the driver's side rear close to the throttle body. Arrow points to it.

Remove the sensor with an extension and 12mm socket.

Old sensor removed.

Install the new sensor. Torque the bolt to 16ft-lbs.

Clear the engine code (if present) using some sort of OBD scan-tool.